The Industrial Revolution had a huge impact on pretty much everything, and one of the things that developed significantly was the warfare, or rather the weapons. The industry was very innovative, and the new technologies resulted in the creation of numerous new and far more deadly weapons. The World War I saw lot of these new weapons being used in practice, resulting in much more deaths because of the higher efficiency from these new weapons. Some things that were used were the new machine-guns, improved riffles, multiple types of hand bombs, submarines, tanks etc. All of those weapons resulted in millions of deaths of both soldiers and civilians unfortunately.
Because not every place has the same language. There are many different places with different culture. It can impact a place in different ways. For example, if you speak spanish in a british place, then some people may be confused or want to learn it. It all depends.
If I’m right it should be D.
He does not just happen to attend; he was the first one to receive a personal invite from Gatsby's butler. After that, he begins to form a friendship with Gatsby and goes to his parties regularly. Hope that helps :/